Mill-type door



J. W. ORROCK.

MILL TYPE DooR. APPLICATION FILED 1AN-24| 1920.

1,389,21 1 Patented Aug. 30, 1921.

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JOHN' W. ORROCK, 0F MONTREAL, QUEBEC, CANADA.

MILL-TYPE DOOR.,-

Specification of Letters Patent.

Patented Aug. 30, 1921.

Application filed January 24, 1920. Serial No. 353,664.

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Be it known that I, JOHN VILsoN ORRooK, a subject of the King of Great Britain, and resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful 1mprovements in Mill-Type Doors; and I do hereby declare the following is a full, clear,

and exact description thereof.

My invention relates to doors for engine houses, shops, freight sheds and other buildings and its object is' to provide a composite door which will be substantially as strong and durable as a metal door.

'To this end my invention consists of a metalc'frame with flared corners, around which is built a series of wooden strips with means for securing the parts together so that on completion there is' evolved a mill type wooden door flat on both sides with steel corners andvertical and horizontal steel supports to which the door fastenings can be applied for operating independently of the Woodwork.

The primary advantages to this type of dooriare great lateral stiffness, an all steel support with a minimum amount of metal and smooth sliding surfaces on both sides for easy operation.

For full comprehension, however, of my invention, reference must be had to the accompanying drawings in which similar reference characters indicate the same parts, and wherein:

Figure 1 is a front elevation of a pair of doors constructed according to my invention F ig. 2 is a vertical sectional view taken on line 2-2 Fig. 1;

Fig. 3 is a horizontal sectional view taken on line 3-3 Fig. 1; and

Fig. 4 is a detail view illustrating the steel reinforcing frame.

My improved door is built up from a skeleton frame of metal. This skeleton frame consists of vertical side frame members v2 and 3 respectively and horizontal top and bottom members 5 and 6 respectively, the abutting ends of these members being bent outwardly as at 4 relatively to the frame at an angle of 45 to the frame members, thus causing the abutting bent ends to coincide and form a radial corner extension, the ends of which form the corners of a rectangular figure longer and wider than the frame proper. These frame members preferably `consist of angler irons and the contacting flanges 9 of the radial corner extensions are fastened together by rivets or bolts 10. The frame thus formed is braced or stiifened by transverse members 7 and S. The corners ofthis frame and the points of connection between the angleeironsi? and 8 and 2 and 3 are strengthened by gusset plates 12. Upon this frame the wooden structure is mounted. This wooden structure consists of vertical stiles 13 and 14, top and bottom'rails 15 and 16, central rails 17 and panels 18 and 19. lVhere two doors are employed for closing the door opening it may be necessary to provide one of them with a wicket 21 the construction of each however, being otherwise in all respects the same.

The stiles 13 and 14 are constructed of a multiplicity of vertically disposed wooden strips the fastenings for securing one strip inplace being covered up by the next vadjacent strip, thereby protecting them from the weather and also from fumes which are so prevalent in locomotive and other shops. The top, bottom and central railsl, 16 and 17 respectively are also constructed of a multiplicity of strips horizontally disposed and secured together in the same manner, the ends being cut off obliquely to fit between the oblique projections 4 at each corner of the ,metal frame and the stiles andY rails are rigidly secured to the frame by bolts 21 extending at right angles to the length of the strips composing each wooden member and having their heads' respectively countersunk in the outside strips of each of the stiles and top and bottom rails and the outside stripsr 22 of the panels 18 and 19. These outside strips extend parallel to the angle irons to which they are secured so that the strips 22 adjacent the top and bottom rails are disposed horizontally, the others adjacent the angle-irons 2 and 3 being disposed vertically. The central rail is similarly constructed, interposed between the flanges 23 of the angleirons 7 and 8 and a strip 24.0n the opposite side of each of such flanges, the whole being secured together by bolts 25 with their heads countersunk in the strips 24.

This construction presents a mill type wood and metal door for engine houses and the like in which the metal is a frame presenting openings in which the wooden panels are set and by which these wooden panels are carried and reinforced. 111 Order to increase the durability and fire-resisting properties of my improved doors each of these panels is composed of a multiplicity of verticallydisposed wooden strips of similar dimensions to those in the parts hereinbefore referred to. These doors When cornpleted may be mounted in the door opening in any preferred manner either by suspending them from their upper ends by pivots or by hinging the steel frame independently of the Wood. The hinging and pivoting of the door through its metal skeleton frame is facilitated by plates 120 fastened rigidly to the radial extensions at the hinged corners of the doors and extended over the top and bottom rails as shown in Figs. 1 and 2 and illustrated in detail in Fig. 4.

If desired the upper panel of each door may be constituted by a Window-sash. The frame of the sash would in this instance be constitued by the strips 22 and 24.

The metal frame per se is a feature of my invention and although it is particularly adapted to a filling of mill type, it may serve as the support for other types of doors than mill type and may be employed by me with or Without the gusset plates 12 and cover plates 120 indicated at the hinged corners of the double doors of Fig. 1 and in detail in Fig. 1.

The doors illustrated in Fig. 1 of the drawing are adapted to be hinged upon trunnions which extend from the top and bottom edges thereof.

l/Vhat I claim is as follows:

1. A mill-type door consisting of a metal frame and a. multiplicity of wooden strips secured together, the fastenings for securing one strip in place being covered by the next adjacent strip.

2. A mill-type door consisting of a metal frame with flared corners and a plurality of Wooden parts mounted upon said frame each of said partsl comprising a multiplicity of Wooden strips secured together.

3. A skeleton frame for a door consisting of vertical and horizontal frame members the abutting ends of which are bent outwardly to present radial extensions; and means rigidly fastening the extensions together.

4. A skeleton frame for a door consisting of vertical and horizontal metal frame members the abutting ends of which are bent outwardly to present radial extensions; and means rigidly fastening the extensions together.

5. A skeleton frame for a door consisting of vertical and horizontal metal frame members tl e abutting ends of Which are bent outwardly to present radial extensions; means rigidly fastening the extensions together; and a plate fastened ,rigidly to the extensions and extending therefrom for the purpose set forth.

6. Al mill-type door comprising a metal frame consisting of vertical and horizontal frame members the abutting ends of which are bent outwardly to present radial extensions; means rigidly fastening the extensions together, and plates fastened rigidly to the extensions and extending therefrom for the purpose set forth, and a plurality of wooden parts mounted upon said frame each of said parts consisting of a multiplicity of wooden strips secured together.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

JOHN W. ORROCK.

lVitnesses T. RUTH, F. MQ DUCKETT. 

